It doesn't create as much spin as a new stringbed of Neon Dust hybrid, but it isn't too far off. Launch angle is a bit lower as well. But at first, the prototype string would let the ball slide off the strings on a skimming type hit, and the ball would end up in the net. After about an hour, it grabs the ball much better and those same shots now clear the net. I could possibly be something I'm doing subconsciously but it doesn't feel like I'm swinging any differently. It definitely also has a bit more pop after that first hour.
In all honesty, the Neon Dust hybrid produces balls pretty similar to Hyper-G. Compared to Hyper-G, Neon Dust is a bit more powerful and definitely more muted and comfortable when mis-hitting. Neon Dust was capable of generating more spin when it was new, but it didn't seem to age as well over time and by the time I cut out the Neon Dust, I was getting more spin out of the Hyper-G stringbed that had about the same or maybe a bit more hours of play in it. Some of this may have been that I need to string the Neon Dust a bit tighter, since I tend to prefer low powered, high control stringbeds but that can still grip the ball well. I'm asking for a lot.
On a slightly different note, testing the lightweight prototype string has confirmed to me that I prefer the way my racquet plays when I use a lighter string and add the weight back at 3 and 9 o'clock. The SW104 doesn't have a particularly large sweetspot considering its weight and head size, so the added twistweight helps with that. I've got 6 inches of lead tape now and it feels great.